Now as to the comment made by this person that ONLY a classical education can make a well rounded musician??? WHat say you there???
A well rounded musician, IMO, needs to have the following skills:
1. Proper technic, to become proficient at the keyboard (hand position, speed, dexterity)
2. Theory- thorough understanding of the language of music
3. Ear-training- good listening skills to assist in memory
4. Sight-reading proficiency-absolutely imperative to be a functional musician
5. Performance opportunities to reinforce memory, among other things
If teachers of other methods, ie: Jazz and contemporary, are careful to include all these important aspects, then, Yes, a student may not need a classical education to become a well-rounded student.
My experience has been that most teachers, classical or not
don't include all these important components. Most classical teachers that I know (even well respected teachers) focus on Technic and Performance and rarely encourage their students to spend large amounts of time becoming proficient in the other areas.
Just my .02 cents